Nature's Alchemy offers a strong lavender essential oil that isn't overwhelming. A few drops added to a small bowl of water provides a long-lasting and pleasant room fragrance (a wonderful alternative to chemical air fresheners).

Warning: This doesn't come with a dripper. I need to transfer it to a smaller bottle of lavender oil for fear of pouring the entire bottle in one go.
Otherwise, this is a lovely herbaceous and mildly floral lavender.